Chemical Composition of the Volatile Concentrate from the Flowers of Vietnamese<i>Alstonia scholaris</i>(L.) R.Br.,<i>Apocynaceae</i>

Abstract

Abstract The flowers of Alstonia scholaris (L.) R.Br., family Apocynaceae, were collected in full bloom from the Hanoi area, Vietnam. The fresh plant material was extracted with hexane, and the combined extracts in slight and wet residue were hydrodistilled. The oil obtained was analyzed by a combination of high-resolution GC and GC/MS. More than 34 components were identified, representing about 92.5% of the oil. The principal constituents were linalool (35.7%), cis- and trans-linalool oxides (furanoid and pyranoid) (14.7%), α-terpineol (12.3%), 2-phenylethyl acetate (6.3%) and terpinen-4-ol (5.6%). The volatile concentrate contained more than 90% of oxygenated compounds, which contributed to its fragrant odor.